Stockholders' Equity (Common Stock) (Details) (USD $)	Mar. 31, 2014	Mar. 31, 2013
Stockholders' Equity Note [Abstract]
Common stock, shares authorized	200,000,000	200,000,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares, outstanding	74,100,000	73,100,000
Treasury stock, shares	13,264,000	14,077,000